If ` sin 2x cos 2x cos 4x=lambda` has a solution then `lambda` lies in the interval

If sin x cos x cos 2x = lambda has a solution, then lambda lies in the interval

If sin x cos x cos 2x = lambda has a solution, then lambda lies in the interval

If the equation 2 cos x + cos 2 lambda x=3 has only one solution , then lambda is

If the equation 2 cos x + cos 2 lambda x=3 has only one solution , then lambda is

If the equation 2 cos x + cos 2 lambda x=3 has only one solution , then lambda is

If the equation 2 cos x + cos 2 lambda x=3 has only one solution , then lambda is

If the equation 2 cos x + cos 2 lambda x=3 has only one solution , then lambda is

If the equation cos^(4)theta+sin^(4) theta+lambda=0 has real solutions for theta , then lambda lies in the interval :

If sin^4theta+cos^4theta+lambda=0 has a real solution then range of lambda is